Hi Siddesh Kapadi,
ImageEditorDialog has two modes - Images
. In Geeneric Content control there is no built-in selector that allows you to select from already uploaded videos. You could use Telerik.Libraries.WebControls.ImageSelector in ShowMode="Documents" which will allow you to select from video libraries. You need to implement a dialog which will set the RadEditor HTML with proper tags. You might find this article useful - Add Custom Dialogs
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